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Effect of the Promoter Presence in Catalysts on the Compositions of Fischer-Tropsch Synthesis Products
Journal of Industrial and Engineering Chemistry ( IF 6.1 ) Pub Date : 2018-10-01 , DOI: 10.1016/j.jiec.2018.05.044
Deniz Uykun Mangaloğlu , Murat Baranak , Özlem Ataç , Hüsnü Atakül

Abstract The effects of alkali promoters namely potassium, copper, and manganese, on the performance of the bi-functional iron–low acidity ZSM-5 catalysts in the Fischer–Tropsch (FT) synthesis were studied. ZSM-5 with very high silica alumina ratio (SAR) of 280 was used to take advantage of its shape selectivity and suppressing the effect of alkali migration on zeolite cation exchange sites. One bi-functional iron base catalyst (FeZ), three single promoted (KFeZ, CuFeZ, MnFeZ) and four multiple promoted (CuKFeZ, CuMnFeZ, KMnFeZ, CuKMnFeZ) catalysts were synthesized by the incipient to wetness impregnation method. They were characterized by XRD, BET, TPR, TEM and TPD analyses methods and tested for their FT synthesis activities. Promoters had considerable impacts on the compositions and the hydrocarbon distributions of the FT synthesis products. Addition of promoters resulted in an increase of up to 8.5–56% and 20–743% in the synthesis of gasoline and diesel range hydrocarbons, respectively. Consequently, the production of the total liquid fuel (gasoline + diesel) also increased from 48% (base catalyst) to 64–79% (promoted catalysts). The highest gasoline range hydrocarbon production was obtained from MnFeZ and CuKMnFeZ (≈70%) while CuKMnFeZ produced a FT product having the highest total liquid fuel (≈79%).

中文翻译:

催化剂中助剂的存在对费-托合成产品组成的影响

摘要 研究了碱促进剂钾、铜和锰对费-托 (FT) 合成中双功能铁-低酸度 ZSM-5 催化剂性能的影响。使用具有 280 的极高硅铝比 (SAR) 的 ZSM-5 以利用其形状选择性并抑制碱迁移对沸石阳离子交换位点的影响。采用初湿浸渍法合成了一种双功能铁基催化剂(FeZ)、三种单促进(KFeZ、CuFeZ、MnFeZ)和四种多促进(CuKFeZ、CuMnFeZ、KMnFeZ、CuKMnFeZ)催化剂。它们通过 XRD、BET、TPR、TEM 和 TPD 分析方法进行表征,并测试了它们的 FT 合成活性。促进剂对 FT 合成产物的组成和烃分布有相当大的影响。添加促进剂导致汽油和柴油烃类的合成分别增加了 8.5-56% 和 20-743%。因此,总液体燃料(汽油 + 柴油)的产量也从 48%(基础催化剂)增加到 64-79%(促进催化剂)。从 MnFeZ 和 CuKMnFeZ (≈70%) 获得最高的汽油范围碳氢化合物产量,而 CuKMnFeZ 生产的 FT 产品具有最高的总液体燃料 (≈79%)。
更新日期:2018-10-01
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